Watchman&#39;s time recorder



Nov. 6

J. L. L. M CORMACK WATCHMAN S TIME RECORDER Filed D80. 27

Patented Nov. 6, 1923.

uNirEo STATES.

PATENT orrice.

JAMES L. L. MoCORMACK, or oH oaedI LI'NoIS, AssIGNoR, BY MESNE ASSIGNMENTS,

T DETEX CORPORATION, or eH 'cAeo, ILLINOIS, A ooRroRArIoN or DELAWARE.

wA'reHMaNs TIME RECORDER.

Application filed December 27, 1921. Serial No. 524,827.

To aZZ 1072 am it may concern: I

Be it known that I, JAMES L. L. MCCOR- MACK, a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois, have invented a certain I new and useful Improvement in W atchmens Time Recorders, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specificatron.

My invention relates to improvements in watchmens time recorders and is particularly concerned with improvements in watchmens clocks or other similar mechanisms.

The objects of my invention are: I First: To provide a clock mechanism for rotating or otherwise moving a dial, or other recordreceiving medium, so constructed that the dial or record receiving medium will be capable of receiving printed records extending over a comparatively large period of days; a y

Second; To provide aclock'of the char- 2 acter described comprising a dial rotating member and means for driving said rotating member at a comparatively slow rate of speed; and I 7 Third: To provide means of thecharacter described which is simple in construction, compact, economical to manufacture and not likely, to become damaged or deranged through jolts or other shocks.

These and other objects are accomplished by means of themechanism illustrated in the accompanying drawings, in which Figure 1 is aplan view of a watchmans clock embodying one form of my invention, the cover of the clock being removed forthe purpose of exposing the interior mechanism;

Figure 2 is a plan View of a portion of the mechanism shown in Fig. '1 from which the cover plate has been removed;

Figure 3 is-a view similar to Fig. 2 except that a portion of the mechanism has been broken away to uncover certain parts of the clock movement; L

Figure 4 is a vertical section taken on line 44 of Figs. 2 and 3; and

Figure 5 is a sectional detail taken on line 55 of Fig. 2.. p U, H v I Throughout the several views, similar ref:

erence characters are used for referring to similar parts, and the sections are taken looking in the direction of the Small arrows.

Inthe drawings in which I have illustrated. my invention in connection with a watehmans clock of more or less conventional construction, I have shown a case 10 in which is housed a clock movement which is indicated as a whole by reference char acter hand which comprises means, aboutto be described, for rotating a paper dial 12 (see Fig. 4-) so that the recording mechanism indicated as a whole by the reference character 13 can make theproper records thereon.

The clock movement which I have illustrated is, with the exception of the improvements which I have provided therein, of conventional constructionand comprises, among other things, the main spring drum l l to which is secured the gear wheel 15. The gear wheel 15 meshes with the gear wheel 16 carried by the pinion 17, which is in turn rotatably supported upon a' setting stem 18. This setting stem projects through the frame plate formed by the two discs 19 and 20.

I A sleeve 21 is rotatably mounted upon the projecting end of the stem 18 and carries the two coacting clamping members 22 and 23, between which the paper dial 12 is clamped.

A gear wheel 24 meshes with the pinion 17 and is carried by the inner end of the shaft 25, which is rotatabiy mounted in a bushing '26 threaded into a suitable opening in the frame plate formed by the discs 19 and 20. The outer end of the bushing 26 is recessed, as shown in Fig. 5, for receiving the mitre gear 27 which meshes with a corresponding mitre gear 28 secured to one end of the worm 2 9. The worm 29 is partially received in a groove or depression 30 formed in the outer surface of the frame plate and is supported by a bracket comprising the plate 31 having the two aligned spaced bearings 32 and 33 in which the worm is journaled. The bracket 31 is secured tothe frame plate by the screw 34, I y y I Meshing with the worm 29 is a worm wheel 35, which is rotatably mounted upon the inner end of the sleeve21 and friction ally engagedtherewith by the, spring metal cup wash r" 36; i this frictional connection by the screws 38, has an inwardly .GCi'Qd' ange 39 for enclosing the mechanism QICiO- rim to the frame plate.

In the preferred embodiment oi"; my in vention, the relation between the gear wheel 15 and the worm 29 is such that the worm 29 makes one revolution for each day. This means that the dial carried by the clamping members 22 and 23 will make one complete revolution in a period of days correspond ing in number to the number of teeth in the worm wheel 35. This makes it possible to provide a record of the activities of a watchman, patrol, or other individual covering a period of two weeks, a month, or even a longer period of time, it desirable. This makes my invention of particular advantage and value in connection with the work of forest rangers, or other similar pat-rolmen, who are absent from their bases of operation for extended periods of time. The clock forming the subject-matter of my invention is, like other well-known watchmens clocks, adapted to be carried by the watchman, pa trolman or ranger and operated to make a record upon the dial by keys positioned and secured at different points in the territory covered by the watchman, patrolman, etc.

By using a worm for driving the dial carrying mechanism, I provide a very compact and rugged construction, and one in which there is no reaction upon the time gear trains of" the clock when the dial is adjusted relatively to the recording n1echauism by rotating the sleeve 21 relatively to the worm wheel The thrust communicated to the worm wheel will not be transmitted inwardly beyond the worm 29. The means which I employ for mounting the worm makes it possible to quickly adjust it and the mitre gear carried thereby relatively to the coacting mitre gear and the worm wheel.

While I have described the details of construction of the preferred embodiment of my invention, it is to be clearly understood that my invention is not limited to these details, but is capable of other adaptations and modifications within the scope of the appended claims.

Having thus described my invention. what I claim is :f

1. The combination with a clockmovement comprising a setting stem, of a frame plate through which said setting stem projects, a dial sleeve rotatably mounted on the projecting end of said setting stem, a worm wheel frictionally engaging the inner end of said dial sleeve, means for connecting to bring the paper dial into the propsaid clock movement and said worm wheel comprising a gear wheel driven "from said movement, a shaft, to the inner end of which said gear wheel is secured, a first bevel. gear secured to the outer end of said shatt't, a bearing bushing for said shaft recessed to receive said first bevel gear and carried by said frame plate, a worm meshing with said worm wheel, a second bevel gear for driving said worm wheel and meshing with said first bevel gear, the outer surface of said frame plate being provided with a depression for receiving said worm, a bracket for supporting said worm comprising a plate having two aligned spaced bearings partially housed in said depression, and single screw for securing said plate to said frame plate.

2. The combination with a clock movement comprising a setting stem, of a frame plate through which said setting stem projects, a dial sleeve rotatably mounted on the projecting end of said setting stem, a worm wheel secured to the inner end of said dial sleeve, means for connecting said clock movement and said worm wheel comprising a gear wheel driven -from said movement, a shaft, to the inner end of which said gear wheel is secured, a first bevel gear secured to the outer end of said shaft, a worm meshing with said worm wheel, a second bevel gear for driving said worm wheel and meshing with said first bevel gear, the outer surface of said frame plate being provided with a depression for receiving said worm, a bracket for supporting said worm comprising a plate having two aligned spaced bearings partially housed in said depression, and means "for securing said plate to said frame plate.

The combination with a clock movement comprising a setting stem, oi a frame plate through which said setting stem projects. a. dial. sleeve rotatably mounted on the projecting end of said setting stem, a worm wheel. secured. to the inner end of said dial sleeve, means for connecting said clock movement and said worm wheel comprising a gear wheeldriven from said movement, a shaft, to the inner end of which said gear wheel is secured, a first bevel gear secured to the outer end of said shaft. a worm meshinn with said worm wheel. a second bevel gear for driving; said worm wheel and. mesh ing with said first bevel gear, the outer surface o't said frame plate being provided with a depression for receiving said worm and a bracket for supporting said worm, said bracket being secured to said frame plate.

4. The combination with a clock movement comprising a setting stem, of a frame plate through which said setting stem pro jects, a dial sleeve rotatably mounted on the projecting end of said setting stem, a worm wheel secured to the inner end of said dial sleeve, means for connecting said clock movement and said worm wheel comprising a gear wheel driven from said movement, a shaft, to the inner end of which said gear wheel is secured, a first bevel gear secured to the outer end of said shaft, a worm meshing with said worm wheel, and a second bevel ear for driving said worm wheel and meshmg wlth said first bevel gear, the outer sur- 

